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Chemistry Form 4 • MODULE

Objective Questions / Soalan Objektif

1 The mass of one atom of element Y is two times more 5 The table below shows the relative atomic mass of neon,
than an atom of oxygen. What is the relative atomic carbon, oxygen and calcium.
mass of element Y? [Relative atomic mass: O = 16] Jadual berikut menunujukkan jisim atom relatif bagi neon,
Jisim satu atom unsur Y adalah dua kali lebih daripada karbon, oksigen dan kalsium.
satu atom oksigen. Apakah jisim atom relatif bagi unsur Y?
[Jisim atom relatif: O = 16] Element/Unsur Relative atomic mass/Jisim atom relatif
A 12 Neon / Neon 20
B 24 Carbon / Karbon 12
C 32
D 36 Oxygen / Oksigen 16
Calcium / Kalsium 40
2 The chemical formula for butane is C H . Which of the
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following statements are true about butane? Which of the following statements is true?
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[Relative atomic mass: H = 1, C =12 and O =16, [Avogadro constant = 6.0 × 10 mol ]
Avogadro Constant = 6 × 10 mol ] Antara pernyataan berikut, yang manakah adalah benar?
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Formula kimia bagi butana ialah C H . Antara pernyataan [Pemalar Avogadro = 6.02 × 10 mol ]
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berikut, yang manakah adalah benar tentang butana? A Mass of one calcium atom is 40 g
[Jisim atom relatif: H = 1, C = 12 dan O = 16, Pemalar Avogadro = Jisim satu atom kalsium ialah 40 g
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6 × 10 mol ] B Mass of 1 mol of neon is 20 g
I The empirical formula for butane is CH . Jisim 1 mol neon ialah 20 g
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Formula empirik butana ialah CH . 2 C 16 g of oxygen contains 6.02 × 10 oxygen
II Each butane molecule is made up of 4 carbon atoms molecule
and 10 hydrogen atoms. 16 g oksigen mengandungi 6.02 × 10 molekul oksigen
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Setiap molekul butana terdiri dari 4 atom karbon dan 10 D Mass of one oxygen atom is 16 times bigger than
atom hidrogen. one carbon atom
III 1 mol of butane contains a total of 8.4 × 10 Jisim satu atom oksigen adalah 16 kali lebih besar daripada
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atoms. satu atom karbon
Jumlah bilangan atom dalam 1 mol butana adalah 8.4 ×
10 . 6 A bulb is filled with 1 800 cm of argon gas at room
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IV One butane molecule has a mass of 84 times higher conditions. What is the number of argon atom in the
than the mass of 1 hydrogen atom. bulb?
Satu molekul butana mempunyai jisim 84 kali lebih daripada [Molar volume of gas = 24 dm mol at room conditions,
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jisim satu atom hidrogen. Avogadro constant = 6.02 × 10 mol ]
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A I and II only Sebuah belon diisi dengan 1 800 cm gas argon pada keadaan
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I dan II sahaja bilik. Berapakah bilangan atom argon dalam belon itu?
B II and III only [Isipadu molar gas = 24 dm mol pada keadaan bilik,
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II dan III sahaja Pemalar Avogadro = 6.02 × 10 mol ]
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C II, III and IV only A 4.515 × 10 22 C 8.03 × 10 22
II, III dan IV sahaja B 4.515 × 10 D 8.03 × 10 21
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D I, II, III and IV
I, II, III dan IV 7 What is the number of hydrogen atom in 0.1 mol of
water? [Avogadro constant: 6.02 × 10 mol ]
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3 A bottle contains 3.01 × 10 of gas particles. What is Berapakah bilangan atom oksigen dalam 0.1 mol air?
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the number of moles of the gas in the bottle? [Pemalar Avogadro = 6.02 × 1023 mol–1]
Sebuah botol mengandungi 3.01 × 10 zarah gas. Berapakah A 6.02 × 10 22 C 6.02 × 10 23
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bilangan mol zarah gas dalam botol itu? B 60.2 × 10 23 D 3.01 × 10 23
A 0.5 mol C 3.0 mol
B 1.0 mol D 6.0 mol 8 5 g of element X reacted with 8 g of element Y to form
a compound with the formula XY . What is the relative
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4 Which of the following gases contains 0.4 mol of atoms atomic mass of element X? [Relative atomic mass:
at room temperature and pressure? [Molar volume of Y = 80]
gas = 24 dm mol at room temperature and pressure] 5 g unsur X bertindak balas dengan 8 g unsur Y membentuk
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Antara gas berikut, yang manakah mengandungi 0.4 mol atom sebatian dengan formula XY . Apakah jisim atom relatif unsur X?
pada suhu dan tekanan bilik? [Isi padu molar gas = 24 dm mol [Jisim atom relatif: Y = 80] 2
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pada suhu dan tekanan bilik] A 25 C 50
A 4.8 dm Ne C 4.8 dm CO 2 B 40 D 100
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B 4.8 dm O D 4.8 dm NH
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2 3
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